Double rotor tor turbines and casing therefor



E. H. SHERB'ONDY.

DOUBLE ROTOR FOR TURBINES AND CASING THEREFOR. APPLICATION FILED APR. 30. 1918.;

1,310,680, Patented July 22, 1919.

' 'drronw er THE COLUMBIA PLANDGRAPH :0. WASHINGTON, D., c.

FTC.

EARL H. SHERBONDY, or CLEVELAND, c1110.

DOUBLE Boron FOR TURBINES AND CASING cinnamon.

Specification of Letters Patent.

Patented July 22, 1919.

Application filed April 30, 1918. Serial No. 231,769.

To allwhom it may concern:

' Be it known that I, EARL H. SHERBo-NDY, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Double Rotors for Turbines and Casings Therefor, of which the following is a specification.

This invention relates to means for obtaining increased power from a turbine rotor, the increase being. attained by doubling the number of disks on the rotor, and delivering high pressure gas onto each set of buckets positioned on said disks.

Another object of the invention is to provide a suitable casing for, use in connection I 7 view of the casing; Fig. 4 is a section on the line 44 of Fig. 2; and Fig. 5 is a section on line 5-5 of Fig. 1. Each of the figures are diagrammatic.

Referring now to the drawings, the rotor 1 of the turbine is mounted to turn with the shaft 2, and may or may not be integral therewith, as desired. The rotor 1 is adapted to carrytwo complete sets of buckets, and to this end is formed with two bodies or disks 3 and 3, which are similar inrgeneral design to the ordinary single body type of rotor. Thedisks 3 and3 are preferably made integral with the body 1 of the rotor, and are spaced apart an appreciable dis tance; the peripheries of the disks 3 and 3 each carry a set of turbine buckets 4: and 4: of any desired design. These buckets are designed to receive gas from the outside and to discharge it into the space between the buckets, each setof buckets being similarly positioned, as in Fig. 5, to turn the rotor in the same direction.

Annular casing elements 6 and 6 bent through substantially a right angle cooperate with similarly bent elements 7 and 7 positioned inwardly thereof to define inlet chambers 8 and 8 respectively. The elementsti and 7, aswell as 6 and 7 converge toward their inner ends to define discharge openings 9 and 9,, in which discharge openlngs may be positioned a nozzle or nozzles 10 and 10, to discharge gas onto the buckets a and 4:, as shown in Fig. 5.

' The two inlet chambers 8 and 8 may each be provided with two inlet pipes'll and 12, and 11 and 12, respectively.

The casing elements7 and 7 may be provided with valve seats 13 and 13 for bypass valves 14 and 14, respectively. These valves may be controlled in any desired manner. r

Positioned between the upper edges of the elements 7 and 7 there is an annular casing element 15, which, with the elements 7 and 7 define the exhaust chamber 16, which, it will be noted, is located between the two inlet chambers 8 and 8'.

l The gases leaving the buckets 4c and 4 escape into this exhaust chamber 16, and pass outwardly through the final exhaust pipes 17 to the atmosphere.

In order to properly guide the gases leaving the buckets, and to prevent collision of the gases, two reversely curved guiding elements 18 and 18 are positioned in the space between the buckets, to deflect the gas radially and outwardly into the exhaust cham ber 16. Elements 18 and 18 may be fastened together, and one of them extended into a supporting wall 19, which wall may be suitably fastened as at 20, to casing element 15. l/Vall 19 may be further supported by one or more studs 19, extending to said wall from the casing 7 or 7, or both.

Louvers 21 may be provided in the wall 19 to permit equalization of the pressure on both sides of the wall 19.

The several casing elements, inlet and exhaust pipes and so on may be suitably fastened together by welding, fianging, riveting, etc., and as before described, may be made of sheet metal.

It is evident that the number of inlet and exhaust pipes may be changed, as desired.

By providing a single wheel with a double set of buckets, and leading fresh gas to each set of buckets, it will be evident that the power of the wheel will be doubled, with fewer parts than in the ordinary two-stage turbine wheel.

While I have illustrated a possible embodiment of my invention, it should be understood that it may be carried out in other ways, as defined within the scope of the appended claims.

I claim- 1. In a turbine, casing elements defining two inlet chambers having discharge openings facing toward one another and each adapted to discharge gas onto a set of turbine buckets, and means positioned between said discharge openings to deflect the gas as it leaves the said turbine buckets radially and outwardly.

2. In a turbine, casing elements defining two inlet chambers having discharge openings facing toward one another, and each adapted to discharge gas onto a set of turbine buckets, means positioned between said inlet chambers to define an exhaust chamber, and means positioned between said discharge openings to deflect the gas as it leaves the said turbine buckets radially andoutwardly into the said exhaust chamber. a

' 3. In combination, a turbine rotor having a double set of buckets, means defining two inlet chambers, means defining an exhaust chamber located between said inlet chambers, and means positioned in said exhaust chamber between the buckets of the rotor to guide the gas as it leaves the buckets in dischamber to deflect gas leaving the said buckets radially and outwardly.

5. In comblnatlon with a turbine rotor having two sets of buckets, a pair of annu lar plates, each bent through substantially a right angle, to define between them an inlet chamber adapted to discharge gas onto one set of buckets, and a second pair of similarly bent annular plates, definlng between them a second inlet chamber adapted to dlscharge gasonto the other set of buckets.

6. The combination as claimed in claim 5,

in combination with means cooperating with certain of said bent plates haust chamber. g g

In testimony whereof I aifix my signature.

EARL: 1-1 SHERBONDY.

to define an ex- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. V i 

